GeForce GTX 850M and GeForce 840M - video card comparison
Passmark - benchmark score GeForce GTX 850M vs GeForce 840M
GeForce GTX 850M
2591
GeForce 840M
1121
GeForce GTX 850M
GeForce 840M
Architecture
Maxwell (2014−2018)
Maxwell (2014−2018)
GPU code name
N15P-GT
N15S-GT
Market segment
Laptop
Laptop
Release date
March 2014
March 2014
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
SLI options
+
-
Boost clock speed
-
1124 MHz
Core clock speed
Up to 936 MHz
1029 MHz
CUDA cores
640
-
Floating-point performance
1,155 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
-
Pipelines / CUDA cores
640
384
Power consumption (TDP)
45 Watt
33 Watt
Texture fill rate
36.08
17.98
Memory type
DDR3, GDDR5
DDR3
Maximum RAM amount
4 GB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
Up to 2500 MHz
2000 MHz
Memory bandwidth
80.0 GB/s
16.02 GB/s
Shared memory
-
-
Standard memory configuration
DDR3 or GDDR5
-
Display Connectors
No outputs
No outputs
eDP 1.2 signal support
Up to 3840x2160
-
LVDS signal support
Up to 1920x1200
-
VGA аnalog display support
Up to 2048x1536
-
DisplayPort Multimode (DP++) support
Up to 3840x2160
-
HDCP content protection
+
-
HDMI
+
-
7.1 channel HD audio on HDMI
+
-
DirectX
12 (11_0)
12 (11_0)
CUDA
+
+
OpenCL
1.1
1.2
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
Ansel
+
-
GameWorks
-
+
GPU Boost
-
2.0
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
+
TrueHD and DTS-HD audio bitstreaming
+
-